V. Jeba Rani, S. Sundar Raj, T. Shyla Isaac Mary. Non-adjacent vertex sum polynomial of Umbrella graphs, Jahangir graph, Tadpole graph and Lollipop graph. Malaya J. Mat. [Internet]. 2021 Jan. 1 [cited 2024 Nov. 21];9(01):941-4. Available from: https://www.malayajournal.org/index.php/mjm/article/view/1201